Electrolier for sewing machines



Margh 1928. 1,661,260

I A.v MULLER .ELECTROLIER FOR. SEWING MACHINES Filed Mach 8.- 1926 Patented Mar. 6, 192 8.

UNITED STATES PATENT OFFICE.

ARTHUR MULLER, OI LOIBENSTEIN, GERMANY.

ELECTROLIER FOR SEWING MACHINES.

Application filed March 8, 1928, Serial No. 93,341, and in Germany March 19., 1925.

Electroliers or illuminating fixtures for sewing machines of the hitherto used construction have the drawback that the attachment thereof to a sewing machine is very inconvenient and interferes with the work. The object of this invention is to provide a construction which can be readily and safely applied to any sewing machine without any changes thereon and in such a manner that the light will 'not produce troublesome shadows.

The invention is illustrated in the accompanying drawing in which similar reference characters denote corresponding parts and in which Fig. 1 is a cross section on line 1-1 of Fig 3; r

ig. 2 is a longitudinal section on line 2 2 of Fig. 3;

Fig. 3 is a top plan view thereof.

In the drawing Z denotes the arm of a sewing machine. The fixture comprises a reflector a in the form of a tubular body of metal or the like longitudinally recessed at one side to form a passage for the rays of light of the incandescent lamp 6. This.

reflector is provided at one end with a neck portion a of reduced diameter and an internally threaded cap shaped extension 0 This reflector is adapted to be screwed onto an externally threaded tubular shell d, formed at its outer end with a central opening d to serve as a passage for the lead-inwires. The lamp socket comprises the inan sulation body 0 of orcelain or the like containing 'a switch 0 suitable construction of which the switch button f is shown in the drawing. This body e is mounted in the shell :5 and properly held in position there- 40 in by tightly screwing the reflector onto said shell so that said body e is clamped between the shoulder a formed by the rear wall of the neck portion a and a shoulder d formed at the rear end of the shell d. The insulation 65 body e carries at its outer end the usual threaded contact shell g forming the socket for the incandescent lamp 6. Screwed onto said contact shell is a lock nut h of porcelainv or other insulation material. Mounted around the neck portion a of the reflector is a substantially U-shaped clamping member' k consisting of a resilient strip of steel or celluloid bent upon itself and whose ends is are suitably curved to conform with the cross sectional shape of the arm of the sewing machine. The circularly curved portion of the member which engages around the neck portion a of the reflector is provided with a lining i of leather, rubber or other suitable friction exerting material. The ends of the clamping member can be tightened to the arm of the machine by a cross screw m extending through perforations of the clamping member and carrying a nut n. c

The device as will be seen can be easily and conveniently attached-to existing sewing machines and adjusted so that the rays of the light will be directed toward the stitches to be formed and the shadow of the needle guide and presser foot be thrown to the rear of the work.

The device can also be conveniently and quickly detached from the machine and 'be used as a search light and for other purposes.

What I claim is 1. In an incandescent lamp fixture for a' sewing machine or the like, the combination with an incandescent bulb and the insulation body containing the switch mechanism for said lamp, of a shield or reflector for said lamp having a reduced neck portion, a shell containing said body, being threadedly connected together to securely hold said body in position, and' a clamping member mounted around said neck portion for adjustably suspending saidfixture from the sewing machine.

2. In an incandescent lamp fixture for a sewing machine or the like, the combination with an incandescent bulb and the insulation body containing the switch mechanism for said bulb, of a shield or reflector for said lamp having a reduced neck portion, a shell containing said body, said shield and shell being threadedly connected togther to securely hold saidbody in position, and a resilient clamping member for adjustably suspending said fixture from the sewing machine, said member being adapted to frictionally and rotatively embrace said neck portion and capable of being clamped to the arm of the sewing machine.

3. In an incandescent lam fixture for a sewing machinev or the like, t e combination with an incandescent bulb and the insulation body containing the switch mechanism for said bulb, of a shield or reflect-or for said'lamp having a reduced neck portion, a

said shield and shell shell containing said body, said shield and securely hold said-body in position, and clamping means f0r-ad ustably suspending said fixture from the sewing machine, said means including a substantially U-shaped 5 member made of resilient material and having a lining of friction exerting material with which it is adapted to adjustably engage the neck portion of said shield, the ends of said member being adapted to engage the arm of the sewin machine and a clamping 10 screw for tightening said ends to said sewing machine.

- In testimony whereof I have afiixedmy signature.

ARTHUR MULLER. 

